The crashes (and other problems) are related to the Bitcasa shell extension but we can't be certain about where the actual fault is as we can't debug their code and find out why it's crashing. It's possible we are doing something wrong which is causing their code to fail, or vice versa, but it's only feasible to debug it if you have access to their code, but it's an opaque box to us as we don't have the source. (We're happy to help debug or test code-changes/theories on our side if we can assist, of course.)
I found these threads via the forum's search, but there may be others. (I think we also looked at some crash dumps people sent which may have been from threads not mentioning "Bitcasa", so they may be missed by the search.)
[ul][li]Right click crash with Bitcasa cloud storage software.[/li]
[li]dopus_lister issue in drive right click.[/li]
[li]Also Icon overlay not showing up in Directory Opus is probably relevant (may be the same underlying problem causing different results for different people).[/li][/ul]